If you're a beginner in polishing and cleaning, try the Midsouth Reloading Brass Tumbler Kit Pro with Brass Sorter. This kit handles many different calibers.
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Sold at Auction: Midsouth Shooters Vibratory Case Tumbler, Media, Case Tumbler
Brass Tumbler « Daily Bulletin
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Brass Tumbler « Daily Bulletin
Brass Tumbler « Daily Bulletin
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Frankford Arsenal Quick-n-EZ Case Tumbler